Lin Yan fell into an epiphany for a while, comprehended the wonderful principle of the harmony of yin and yang, and finally comprehended the mystery of yin and yang of fire, and formed a bud of the tree of yin and yang mystery in the sea of knowledge. Unconsciously, five hours have passed, and Lin Yan has been immersed in epiphany, but he has forgotten the most important purpose of this trip.

If you want to break through Qi training, there is no such trouble as refining the body, and there are two main ways to break through the innate Qi training. The first method, with the help of the pill to break through, is also the simplest one, taking the innate pill and opening up the dantian qi sea, you can break through to the innate realm. The second method is to rely on one's own breakthrough, break the innate barrier, and open up the dantian qi sea to break through to the innate realm. Of course, the difficulty of these two methods is different, and the size of the dantian qi sea opened up is also different, and the strength after breaking through will also be very different. If you use the second method to break through, the dantian qi sea will be even greater, and the strength will be much stronger than that of the person who uses the first method to break through.

Lin Yan comprehended the mystery of yin and yang, and already had the strength to break the innate barrier, but Lin Yan did not want to break through the ability to the innate ability, but wanted to let the fire ability and the refining body break through together. When opening up the dantian qi sea, at the same time, the refining body broke through to the innate realm.

The ability is actually a type of Qi martial artist, and when the ability breaks through to the S-level, it is not much different from the martial artist, which is why there are no S-level abilities. After the ability breaks through the innate ability, there will be no difference between it and the martial artist. It's just that a pure martial artist does not only practice qi, but cultivates both, and every powerful martial artist has a strong physique. The ability can be regarded as an extreme path, but as long as it reaches the innate realm, it can still be quickly made up.

However, martial arts refining is different from pure refining, martial arts refining is to nourish the body through the aura in the body, and gradually make one's body indestructible. This is how the Adept makes up for his physical deficiencies, but just by spending a little more time. However, some powerful people felt that this method was too slow, so they created a special body refining and cultivation system. If you only refine your body and don't practice qi, you are actually abandoning your roots. The dual cultivation of the two will bring earth-shaking changes in power. It's just that it's a lot more difficult.

Therefore, Lin Yan now wants to cultivate both martial arts and physical fitness, that is, to practice qi and refine the body, only when the two are combined with each other can he become a powerful martial artist. However, in this case, not only do you need a strong talent and huge cultivation resources, but the most important thing is that you need a super exercise that can double cultivate, and it is precisely the "Flood Desolation Holy Body" that is such a super exercise. All these things are indispensable, otherwise it will just delay time, and in the end it will only be high or low, neither of which can break through to a higher realm, and it will only be a waste of their talent.

The most important thing for Lin Yan now is to find enough gray innate qi, so that both body refining and qi cultivation can break through to the innate realm at the same time, so that he can achieve dual cultivation of both. Because, if you want to double cultivate, one thing is also crucial, that is, the two must break through at the same time, otherwise it is very likely to go crazy. Of course, this is only a breakthrough limited to the big realm, and the small realm has no effect.

In ancient times, such martial artists who cultivated both martial arts and physical bodies called themselves true martial artists. Its meaning refers to those who truly understand the true meaning of martial arts. Of course, these are all what Zhu Rong told Lin Yan. However, true martial artists must at least reach the innate realm, so they didn't tell Lin Yan before.

It's a pity that there are very few such true warriors for a long time, and the specific reasons for this are needless to say. After all, this kind of double cultivation is really too difficult, and it is not something that ordinary people can insist on.

What Lin Yan didn't know was that it was not this reason that caused the True Martial Artists to gradually disappear and tend to become extinct, but that there were other reasons. However, Zhu Rong did not tell Lin Yan about it, it contained too many secrets, and for the current Lin Yan, it was not good for him to know these too early.

Refining the body is different from refining qi, if you want to break through the innate realm, there is no shortcut to choose from, and it is impossible to break through to the innate realm without innate qi.

Moreover, if you want to cultivate both martial arts and physical bodies, you must at least have a gray level of innate qi, and a level of innate qi that is too low will not be able to break through the body refining and qi cultivation at the same time. Of course, if you can find the innate purple qi in the teleportation, it will be the best. However, such a thing as innate purple qi is hard to find, even in the Yin Yang Heavenly Pool, it may not be available, and Lin Yan does not have much hope for this.

Lin Yan continued to dive, and it was almost ten hours since he entered the Yin Yang Heavenly Pool, although Lin Yan could not breathe for a long time, but he could not not breathe all the time, and there was also a time limit. Even with Lin Yan's current strength, he could only stay underwater for twelve hours at most.

So Lin Yan's time is running out now, less than five hours. This also meant that Lin Yan had to leave the deep water area of the Yin-Yang Heavenly Pool within five hours.

Lin Yan has now dived to a depth of 8,500 meters, the innate qi here is already very common, and all of them are gray, Lin Yan has already collected enough innate qi, but Lin Yan is still continuing to dive, the purpose is to find the legendary innate purple qi. According to Ta Ling, there may be traces of Innate Purple Qi in the deepest part of the Yin-Yang Heavenly Pool, because there used to be a small amount of Innate Purple Qi there.

Although he was not sure, Lin Yan still wanted to give it a try, after all, this was a rare opportunity, and Lin Yan did not want to miss it.

However, as the depth continued to increase, the pressure Lin Yan felt became greater and greater, and the speed of the dive gradually became slower and slower, even if Lin Yan changed the direction of the water flow with the meaning of yin and yang, he still could not completely eliminate the huge water pressure, and could only weaken a little.

After another hour, Lin Yan finally dived to a depth of nine thousand meters, and the gray yin and yang qi around him could already be seen everywhere, like gray fish, swimming around in the water.

Lin Yan watched the gray innate qi become more and more dense, and a smile slowly appeared on his face, according to the current situation, the probability of innate purple qi appearing at the bottom of the heavenly pool was still very high.

Finally, with less than three hours left, Lin Yan finally dived to a depth of 10,000 meters, and in front of him was the third layer of the Yin-Yang Heavenly Pool, which was the most important place in the Yin-Yang Heavenly Pool-Yin-Yang Jedi!

The so-called Yin Yang Jedi is the place where the eye of a huge formation is located, and the Yin Yang Heavenly Pool is built on this huge formation. The supreme power of the Yin Yang Heavenly Pool comes from this formation. This is also the place where Innate Purple Qi is most likely to appear.

Lin Yan's time was running out, so he immediately turned on his spiritual power perception and began to probe the traces of innate purple qi. Because of the huge pressure, Lin Yan's spiritual power perception was compressed to a distance of less than three meters, and Lin Yan could only grope a little bit. The huge and powerful energy magnetic field of the Yin and Yang Jedi made it impossible for any light to shine on this area, causing it to be pitch black, and relying on spiritual power to perceive was the only way for Lin Yan to do so at present.

Just like this, inch by inch, Lin Yan still found nothing for half an hour, and Lin Yan was about to give up. But at this moment, there was a sudden turn for the better, and Lin Yan sensed a wisp of lilac air flowing in front of him, just like the innate purple qi that Zhu Rong told him.

Lin Yan slowed down the speed of the search, and slowly groped around it when it appeared, and finally, Lin Yan found a trace of clues.

After spending several hours of hard work, Lin Yan's efforts finally paid off, looking at his own wisps of thin purple airflow, the corners of Lin Yan's mouth showed a faint smile. Although it was only a wisp of innate purple qi, it proved the possibility of the existence of innate purple qi and made Lin Yan see the hope of victory.

Lin Yan carefully put away this wisp of heavenly purple qi and began to continue searching. Lin Yan needed a large amount of innate qi, if it was just this wisp of innate purple qi, it would not be of great help to him.

After finding a wisp of innate purple qi, Lin Yan's search speed became slower and slower, but time was getting less and less, if Lin Yan couldn't reach the surface of Tianchi within the remaining time, the huge pressure would cause him to suffer serious trauma.

Finally, when there was still an hour left, Lin Yan successfully explored the entire area at the bottom of the lake. Lin Yan had harvested a total of fifteen wisps of innate purple qi, which was already almost all the innate purple qi in the Yin Yang Heavenly Pool, Lin Yan didn't know if he was enough to support himself to break through to the innate realm, but now he had no other choice, because the time was coming soon, and he had to leave the deep water area.

The speed of the ascent was more than twice as fast as the dive, and in just half an hour, Lin Yan had already risen to the surface of the Tianchi. During the time that Lin Yan was diving, all the people were completely immersed in cultivation. Therefore, until now, no one has found that Lin Yan has disappeared for a while, so Lin Yan secretly breathed a sigh of relief. He didn't want anyone else to know too many of his secrets, which would put him in an even more dangerous situation. This is what Zhu Rong taught him, never expose all his secrets.

Although Lin Yan now had enough innate qi, he knew that now was not the time for him to break through, at least the Yin Yang Tianchi was not a good place to break through. Lin Yan was sure that no one from the Nine Great Families knew the dual cultivation of martial arts, but just in case, Lin Yan had to be cautious.

Zhu Rong had already told Lin Yan before that it was best for him not to expose his martial arts dual cultivation, otherwise it would cause a lot of unnecessary trouble. He knew that Zhu Rong warned him like this, there must be some special reason. Therefore, Lin Yan decided to leave the Inheritance Cave Heaven and then find a quiet place to break through the innate realm.

Now, in order not to let others notice anything unusual, Lin Yan had no choice but to pretend to enter the cultivation state like everyone else.

However, after a while, Lin Yan suddenly heard a loud noise, and the surrounding water began to flow abnormally. Lin Yan opened his eyes, but what he didn't expect was that the person who caused this series of movements turned out to be ......